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Disinfection method using waste heat cooperated persulfate galvanic cell activation

A technology for activating persulfate and disinfection methods, which is applied in the field of water treatment, can solve the problems of less investment and use, and achieve the effects of no secondary pollution, good application prospects, and simple equipment

Active Publication Date: 2017-12-05
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the recycling cooling water of process equipment in steel mills, chemical plants, and power plants, as well as the low-temperature waste heat recovery and utilization of slag washing water and foaming slag water in ironmaking blast furnaces have broad prospects, but they are rarely put into use, mainly used for heating and bathing in factory areas

Method used

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  • Disinfection method using waste heat cooperated persulfate galvanic cell activation
  • Disinfection method using waste heat cooperated persulfate galvanic cell activation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Configure the electrochemical system at room temperature, that is, connect the iron sheet positive electrode and the graphite negative electrode into a galvanic cell, put them into a 200mL beaker, and the beaker contains electrolyte Na 2 SO 4 The solution is 0.05M / L, and the concentration of sodium persulfate is 3mM / L. The initial temperature of the system was raised to 35°C by the use of residual hot water, and the initial pH was 9 to react for 1 hour. The selected strain was Bacillus glaciens, and the sterilization rate was 99.9967%. The results of the disinfection process are shown in Table 1:

[0021] Table 1

[0022] Time / min

Embodiment 2

[0024] Configure the electrochemical system at room temperature, that is, connect the iron sheet positive electrode and the graphite negative electrode into a galvanic cell, put them into a 200mL beaker, and the beaker contains electrolyte Na 2 SO 4 The solution is 0.05M / L, and the concentration of sodium persulfate is 6mM / L. The initial temperature of the system was raised to 35°C with residual hot water, the initial pH was 7 and the reaction time was 30 minutes. The selected strain was Escherichia coli, and the sterilization rate after 20 minutes could reach 99.9999%. The results of the disinfection process are as follows:

[0025] Table 2

[0026]

[0027]

Embodiment 3

[0029] Configure the electrochemical system at room temperature, that is, connect the iron sheet positive electrode and the graphite negative electrode into a galvanic cell, put them into a 200mL beaker, and the beaker contains electrolyte Na 2 SO 4 The solution is 0.05M / L, and the concentration of sodium persulfate is 6mM / L. The initial temperature of the system is raised to 25°C by using residual hot water, the initial pH is 7 and the reaction is 60min. The selected strain is Escherichia coli, and the sterilization rate can reach 99.9999% after 20min. The results of the disinfection process are shown in Table 3:

[0030] table 3

[0031] Time / min

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Abstract

The invention provides a disinfection method using waste heat cooperated persulfate galvanic cell activation, and belongs to the technical field of water treatment. The method comprises the following steps: a bacterial liquid and persulfate are added into a galvanic cell reactor having an iron sheet negative electrode, the iron sheet loses electrons to generate Fe<2+>, the Fe<2+> enters the obtained solution and activates the persulfate to generate sulfate radicals for killing microbes; and waste heat water is added to a magnetic stirring water bath kettle and is naturally cooled. The method simulates the heating of a galvanic cell system by recirculated cooling water of industrial devices in a power plant, blast furnace slag washing water, slag soaking water and other waste heat water in order to increase the reaction rate. The method has the advantages of simple process, low cost, no secondary pollutants, generation of current, high-efficiency disinfection function, provision of a new way for the recycling of low-temperature waste heat, and wide development prospect.

Description

Technical field [0001] The invention relates to the technical field of water treatment, in particular to a disinfection method for activating persulfate by using waste heat in conjunction with a primary battery. Background technique [0002] Persulfate is relatively stable in the environment, has good water solubility, and is mostly solid for storage and transportation. In recent years, activated persulfate has been used to produce The advanced oxidation method is valued. The biggest advantage over hydroxyl radicals is that the half-life is longer (4s), and its standard electrode potential (2.6V) is close to the standard electrode potential of hydroxyl radicals (2.8V). It is believed to be able to oxidize most pollutants and has a wide range of pH applications. Therefore, this type of method is often used to remove organic wastewater such as dye wastewater, and micro-pollutants such as pharmaceuticals and personal care products. The environmentally friendly persulfate is finall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/467
CPCC02F1/4606C02F1/46176C02F1/4672C02F2201/46155C02F2303/10C02F2305/02C02F2305/023
Inventor 张玲玲马鸿坤苍大强丁薇李子富姜峰闫政序
Owner UNIV OF SCI & TECH BEIJING